Source Crayola® CSS3 CSS4
#b5b1a1
 
#b0b7c6
cadet blue
#a9a9a9
dark gray
#a9a9a9
darkgrey
#7c776c
 
#757575
sonic silver
#808080
grey
#808080
grey
#56514b
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen